Optimization of impact hydroforming process for aeronautical components of aluminum alloy sheets with thin wall and deep cavity

XU Yong; YIN Kuo; XIA Liangliang; MEN Xiangnan; ZENG Yipan; ZHANG Shihong

doi:10.7527/S1000-6893.2020.24831

ACTA AERONAUTICAET ASTRONAUTICA SINICA >

2021 , Vol. 42 >Issue 10: 524831 - 524831

DOI: https://doi.org/10.7527/S1000-6893.2020.24831

Article

Optimization of impact hydroforming process for aeronautical components of aluminum alloy sheets with thin wall and deep cavity

XU Yong ,
YIN Kuo ,
XIA Liangliang ,
MEN Xiangnan ,
ZENG Yipan ,
ZHANG Shihong

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1. China Shi-Changxu Innovation Center for Advanced Materials, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China;
2. College of Metallurgy and Energy, North China University of Science and Technology, Tangshan 063210, China;
3. AVIC Chengdu Aircraft Industrial(Group) Co. Ltd., Chengdu 610092, China

Received date: 2020-10-09

Revised date: 2020-10-28

Online published: 2020-12-25

Supported by

National Natural Science Foundation of China (51875548); Sichuan Science and Technology Program (2019YFSY0050)

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Abstract

To realize one-step forming of aeronautical components of LY12 aluminum alloy sheets with thin wall and deep cavity by impact hydroforming, the response surface method combined with the impact hydroforming experiment was employed to optimize the process parameters. A model for the response between the response quantity and the optimization variable was established by taking the thinning rate and the sticking rate as the response quantity, and the blank holder force and impact force as optimization variables. The central composite design method was selected for experimental design, and experimental scheme was designed with the software of Design Expert 12. The first-order response model on the thinning rate and the second-order response model on the sticking rate were established. The optimization results show that when the blank holder force is 1.443 MPa and the impact force is 12.594 MPa, the requirements for thinning rate and filming rate can be reached at the same time. The relative error between the thinning rate and the predicted value is less than 5%. The results show that the proposed response surface model has good accuracy and predictability. The cylindrical components formed by the optimized process parameters meet the requirements on product quality.

Key words： aeronautical complex-shaped thin-walled component; impact hydroforming; response surface method; central composite design; process parameters optimization

Cite this article

XU Yong , YIN Kuo , XIA Liangliang , MEN Xiangnan , ZENG Yipan , ZHANG Shihong . Optimization of impact hydroforming process for aeronautical components of aluminum alloy sheets with thin wall and deep cavity[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2021 , 42(10) : 524831 -524831 . DOI: 10.7527/S1000-6893.2020.24831

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